DISTINGUISHED SERVICE Defense Secretary Leon E. Panetta congratulates Deborah Mullen, wife of Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, after presenting her with the Distinguished Public Service award, Sept. 30, 2011. The presentation was part of the Chairman of the Joint Chiefs of Staff change of responsibility ceremony on Joint Base Myer-Henderson Hall, Va. Army Gen. Martin E. Dempsey took responsibility as the 18th chairman of the Joint Chiefs of Staff from Mullen during the ceremony. SHARE IMAGE: Download Image: Full Size (0.05 MB) Photo By: VIRIN: 846975-Z-OQZ68-498.jpg Photo Gallery